With Bioflavonoids & Rutin Antioxidant Power of Vitamin C Non-GMO A Dietary Supplement Vegetarian/Vegan How it works: Vitamin C is an essential nutrient well known for its support of healthy immune system function. As a powerful antioxidant, it can protect the body’s structures from oxidative damage generated by cellular metabolism. Vitamin C plays an important role in a number of metabolic functions, including the regeneration of Vitamin E and the activation of folic acid. Because Vitamin C is a critical cofactor in the formation of collagen, it helps maintain the connective tissue that supports skin, bones, teeth, and arterial walls.